see here. The trunk contains the motor controller as well as six 12 volt, 17 amp hour batteries (4 for the motor, 1 for lights, 1 for the car stereo) . The roof is rated to withstand full coverage of thin solar panels, but until the nano geeks make the new age of printable solar panels commercially available, it is just way more cost effective to put my spare resource dollars into better batteries. … recumbent pedicab venice solar gondola hub motor emission free innovate or die trike human …... more